1 If you happen to keep a bird feeder in your yard, you may find yourself filling up the feeder constantly. You may be feeding not only birds, but also squirrels! Although you may not welcome these bushy-tailed animals' visits, you cannot do much to stop them. That is because squirrels are extremely agile. It seems they can always find a way to the hard-to-reach feeder.2 Squirrels are rodents. They are related to some of the world's most disliked animals -- mice and rats. Like their notorious relatives, squirrels also have four large, strong incisor teeth that grow throughout their life. To wear down their teeth, squirrels must nibble often. Fortunately for squirrels, they don't have to split their time between tending to their teeth and finding food to eat. Indeed, their favorite foods, nuts and seeds, often come with hard shells that squirrels can grind their teeth against. In addition to nuts and seeds, squirrels also love fruits, pinecones, roots, fungi, mushrooms, buds, and flowers. If food becomes scarce, squirrels expand their diet to include bird eggs, insects, or other small animals.3 There are over 200 different species of squirrels on Earth. The African pygmy squirrel holds the title of the world's .....For the complete story with questions: click here for printable